Some corporations will also be concerned, said Chris Wysopal, chief technology officer of computer security consultant Veracode.

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And Sinosun Technology, a maker of computer security software backed by Granite Global Ventures, which also backed Tudou, rose by 5.9% on Friday, after gaining 9.7% on Thursday.

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The fact that ILOVEYOU was seemingly unaffected by most companies' front-line defenses should serve as a wake-up call to businesses that in the ever-mutating world of computer viruses, security software must constantly be updated with the latest technology.

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